My buyer wants a long completion date. Should I agree?

Almost every seller hears this at some point, and almost every one of them reads it as a stall. Usually it is not. A buyer with a lease running down, a school term to work around, a new job starting in the spring, or a rental notice period will ask for a longer run to completion for reasons that have nothing to do with cold feet.

What is the difference between exchange and completion?

Exchange of contracts is the point at which both sides sign and become legally bound to the sale. Completion is the later day when the money is transferred and the keys are handed over.

Everything about your risk sits in that gap. Before exchange, either side can walk away and owe the other nothing. After exchange, a buyer who pulls out normally forfeits their deposit and can be pursued for your losses.

This is why the length of the completion date matters far less than when you exchange. A four-month completion agreed at exchange is a plan. A four-month wait before exchange is exposure.

Is a long completion date a red flag?

On its own, no. What tells you something is whether the buyer is spending money while they wait.

Commitment is measured in money spent, not in enthusiasm expressed. A buyer who has paid a solicitor, ordered searches and booked a survey has several hundred pounds at stake and behaves accordingly.

Why does the waiting itself carry risk?

Because the longer a sale runs before it is legally binding, the more chances it has to die. The 2026 data makes that plain.

Read the last two rows together and the point lands. Sales are increasingly failing late, after months of work, and leasehold sales fail later still.

What should I do when a buyer asks for a long completion?

1. 1. Ask what the date is for

   A genuine constraint has a name attached to it: a tenancy ending, a school year, a build finishing, a job start. Ask through your agent and listen for whether the answer is specific.

2. 2. Separate the two dates in the conversation

   Say plainly that you are open to their completion date and that you want to exchange contracts early. This reframes the negotiation from how long you will wait to when you both commit.

3. 3. Get a target exchange date in writing

   Ask your agent to confirm the agreed exchange target by email to both solicitors. An unwritten date is an intention. A written date is a timetable everyone can be held to.

4. 4. Check the buyer is spending their own money

   Solicitor instructed and paid, mortgage application submitted, searches ordered, survey booked. Ask for confirmation of each as it happens rather than taking a general reassurance.

5. 5. Hold back your own irreversible spending

   Instructing your solicitor early is inexpensive and keeps momentum. Paying for a management pack, ordering your own searches, booking removals, or paying a reservation fee on an onward purchase can wait until the buyer has committed financially.

6. 6. Decide your walk-away point before you need it

   Pick a date by which you expect exchange, and decide now what you will do if it passes. A seller who has already made that decision negotiates calmly. A seller deciding in the moment usually concedes.

7. 7. Keep your onward purchase in step

   If you are buying as well, tell your own seller the exchange timetable rather than the completion date. Chains break when one link is working to a different clock from everyone else.

Should I stay on the market until we exchange?

That is your call, and it is a genuine trade-off. Coming off the market entirely is a gesture of good faith that most buyers expect and most agents will push for.

A middle position exists. You can accept the offer, mark the property as sold subject to contract, and still take a backup viewing if one is offered, provided you are open about it. What you are protecting against is a collapse at day 100 with no interest left to fall back on.

How do I keep control without souring the sale?

Every step above is compatible with a warm, cooperative sale. You are not testing the buyer or playing a tactic. You are matching your commitment to theirs, step for step, which is exactly what a well-run sale looks like from both sides.

Keep the tone practical and the dates written down. Most buyers who ask for a long completion have a real reason, and a buyer with a real reason has no problem committing to an early exchange.

The timeline belongs to you. ValuQ gives UK homeowners free, side-by-side property valuations from competing local estate agents, so the person handling this conversation on your behalf is one you chose after comparing valuation, fee and strategy rather than the first one who called.